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All results from a given calculation for H2OHCOOH (Water formic acid dimer 2)

using model chemistry: B1B95/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B1B95/6-31+G**
 hartrees
Energy at 0K-266.122278
Energy at 298.15K-266.126215
Nuclear repulsion energy117.603762
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at B1B95/6-31+G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3959 3787 113.66      
2 A 3780 3616 31.52      
3 A 3776 3612 184.51      
4 A 3135 2998 10.87      
5 A 1827 1748 382.07      
6 A 1627 1557 149.81      
7 A 1425 1364 4.27      
8 A 1319 1262 41.11      
9 A 1169 1118 246.37      
10 A 1070 1023 3.12      
11 A 701 671 172.13      
12 A 633 605 57.22      
13 A 464 444 113.58      
14 A 377 360 204.66      
15 A 165 158 2.76      
16 A 111 106 20.44      
17 A 80 76 36.93      
18 A 54 51 134.30      

Unscaled Zero Point Vibrational Energy (zpe) 12835.1 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 12278.0 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at B1B95/6-31+G**
ABC
0.80386 0.09439 0.08449

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31+G**

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -1.790 0.447 -0.011
O2 -2.372 -0.326 -0.015
O3 0.207 0.939 0.005
H4 -3.271 0.007 0.038
C5 0.672 -0.178 0.021
O6 1.977 -0.448 -0.010
H7 0.077 -1.097 0.061
H8 2.454 0.396 -0.046

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 O6 H7 H8
H10.96762.05691.54572.54003.87142.42364.2445
O20.96762.87270.96013.04764.35032.56844.8799
O32.05692.87273.60101.20942.24802.04052.3118
H41.54570.96013.60103.94715.26743.52515.7388
C52.54003.04761.20943.94711.33281.09551.8737
O63.87144.35032.24805.26741.33282.00880.9708
H72.42362.56842.04053.52511.09552.00882.8095
H84.24454.87992.31185.73881.87370.97082.8095

picture of Water formic acid dimer 2 state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 O2 H4 106.616 H1 O3 C5 98.767
O2 H1 O3 140.806 O3 C5 O6 124.251
O3 C5 H7 124.493 C5 O6 H8 107.820
O6 C5 H7 111.256
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.380      
2 O -0.756      
3 O -0.472      
4 H 0.368      
5 C 0.331      
6 O -0.396      
7 H 0.181      
8 H 0.365      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.936 0.903 0.104 1.305
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.021 -0.753 -0.533
y -0.753 -26.130 -0.120
z -0.533 -0.120 -24.890
Traceless
 xyz
x 9.489 -0.753 -0.533
y -0.753 -5.675 -0.120
z -0.533 -0.120 -3.814
Polar
3z2-r2-7.628
x2-y210.109
xy-0.753
xz-0.533
yz-0.120


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.201 -0.275 -0.039
y -0.275 4.243 -0.029
z -0.039 -0.029 2.845


<r2> (average value of r2) Å2
<r2> 124.473
(<r2>)1/2 11.157